Vibration damper obtained by adjusting the resin and aromatic components of the asphalt base

Abstract

Disclosed herein is a vibration damper comprising 30-70 wt. % of a vibration damper base composed of approximately 30-38 wt. % of a resin component and approximately 55-65 wt. % of aromatic components and obtained either by adjusting the components contained in an asphalt base crude oil in the course of its refining or by blending and adjusting a resin component and aromatic component contained in petroleum asphalt, and 50-20 wt. % of an inorganic filler in the form of a thin flake of 20-200 mesh, the sum of said vibration damper base and filler being at least 80 wt. %. The vibration damper is suitable for installation on the floors of vehicles.

What is claimed is: 
     
       1. A vibration damper comprising: 30-70 wt. % of a vibration damper base containing approximately 30-38 wt. % of a resin component and approximately 55-65 wt. % of aromatic components and obtained either by adjusting the components contained in an asphalt base crude oil in the course of its refining or by blending and adjusting a resin component and aromatic component contained in petroleum asphalt; and   50-20 wt. % of an inorganic filler in the form of a thin flake of 20-200 mesh,   the sum of said vibration damper base and filler being at least 80 wt. %.   
     
     
       2. The vibration damper as claimed in claim 1, wherein when the vibration damper base contains, as inevitable components, an asphaltene component and a saturated component, both asphaltene component and saturated component are contained in amounts of 5-12 wt. %. 
     
     
       3. The vibration damper as claimed in claim 1, wherein the inorganic filler is mica. 
     
     
       4. The vibration damper as claimed in claim 1, which further contains organic fibers. 
     
     
       5. The vibration damper as claimed in claim 1, wherein the vibration damper base and the filler are contained in amounts 45-60 wt. % and 50-25 wt. %, respectively. 
     
     
       6. The vibration damper as claimed in claim 1, wherein the content of the aromatic component or saturated component contained in the vibration damper base is adjusted to control a temperature at which the vibration damper base exhibits a maximum internal loss factor. 
     
     
       7. The vibration damper as claimed in claim 1, which has been caused to foam with a blowing agent and a foaming aid in amounts of 0.5-3 wt. % and 0.5-6 wt. %, respectively, of the whole weight of the vibration damper.